| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To stabilize the strength of a tubular body by lessening the increase of the weight and thickness. <P>SOLUTION: The tubular body comprises a fiber bundle enhancing resin layer 10A' which has two or more fiber bundle groups having a plurality of fiber bundles bundling reinforced fibers preparing space more than average width dimension in plan view of the fiber bundle and side-by-side arranged pointing the same direction, and is formed with a prepreg sheet having each of the groups put on superimposed relationship as the orientation of each groups differs mutually and impregnated with a synthetic resin, and unidirectionally aligned fiber reinforced plastic layers 10B', 10C', and 10D' which are formed with a prepreg sheet having a reinforced fiber aligned in the specific direction and impregnated with a synthetic resin outside the layer. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
